MONGOID-4785 remove failInternalCommand (#2037)
MONGOID-4785 remove failInternalCommand (#2037)

Co-authored-by: Grace Chong <d1f9bb63150ed317ab9d2e6e6a89976f4593d141@mongodb.com>
mongodb/mongo-ruby-driver,mongodb/mongo-ruby-driver,mongodb/mongo-ruby-driver